$9.25, located in Miami, Florida, USA (331**), item #224478690113
Also known as: 25A20, 25C20, 025C0020, 25A18. Chamberlain 25C20 - Sprocket Coupling for Screw Drive Garage Door Operators Part. Chamberlain 25C20 - Sprocket Coupling. Liftmaster 25C20 Screw Drive Rail Sprocket Coupling Garage Opener 1000SDR 3240.